Benjamin marshall



(No Model.)

B. MARSHALL.

SASH FASTBNER.

No. 433,600. Patented Aug. 5, 1890.

/ lil 420,425, dated January 28, 1890.

i UNITED STATES 4ter understanding of its construction and PATENT OFFICE.

BENJAMIN MARSHALL, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE MARSHALL IMPROVED WINDOW FURNITURE COMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent N5. 433,606, dated August 5, 1890.

Application filed Mara ze, 1890,.

To @ZZ whom it may concern.-

Be it known that I, BENJAMIN MARSHALL, a citizen of the United-States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Sash-Locks; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to the class of sashlocks; and it consists in the novel catch and the means for operating it hereinafter fully described, and specifically pointed out in the claims.

The object of my invention is to provide a simple and effective means for operating any sash lock or catch which employs a detent or pawl adapted to be projected and withdrawn in order to effect the locking and the release of the sash.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure l is a perspective view of one corner of a window-sash, a portion of the casing being broken away to show the rack, the pinion, and the detent or pawl. Fig. 2 is a section of t-he sash-corner, showing the interior parts. Fig. 3 is a section showing' the pushbutton, the dotted line showing it pushed in. Fig. 4C is a view showing the push-button turned axially. Fig. 5 is a perspective view of the push-button.

Although my invention is applicable to any locking mechanism wherein a detent or pawl is adapted to be projected and withdrawn from a given part, I have herein, for the betmode of operation, illustrated it, and will describe it in connection with that general form of sash-lock in which a pinion engages a rack, and especially in connection with that special form of sash balance or raiser secured to me by Letters Patent of the United States No.

A is a sash. B is a pinion carried thereby. C is a rack fixed to the window-casing. These parts may represent a portion of Ione forni of a sash-lock, which can be rendered complete by a suitable detent or pawl to lock the pinion. In my patent above referred to these parts form a portion of a sash. balance or raiser, the pinion being o n a turn-rod Z2 and semi No. `34.5,35a (No mafia)- l affected by spring b', let into a bore in the sash-rail.`

It will be seen that if the motion of the pinion be arrested by projecting a detent or pawl between its teeth the sash cannot be moved up or down and will be normally locked.

D is the sliding or movable detent or pawl, which is adapted to be projected between and to be withdrawn from the teeth of the pinion. This detent or pawl is seated in a plate E, attached to the sash, and has a top arm ol. A spring F is connected at one end with the arm el and at its lower end with the plate E, and the tendency of said spring is to keep the detent or pawl to its engagement with the pinion, whereby the sash is normally in a locked condition. Now in order to easily and practically release this pawl, both temporarily and for a longer period, I have the following mechanism:

Gis a push-button seated in the windowsash. Its outer end is provided with a suitable thumb-piece g, wherebyit maybe axially turned. The push-button is so mounted in its seat that it may have both a longitudinal sliding movement and an axially rotary one. It is held in its seat by means of a collar or liange g upon it so that it cannot be pulled out. The inner end of the push-button is beveled, as shown at g2, and said end passes directly under the top arm d of the detent or pawl I). Now when itis desired to unlock the sash temporarily, so as to raise or lower it, the push-button is forced inwardly, whereby its beveled inner end, acting as an inclined plane or cam under the top arm d of the detent or pawl, raises said arm and lifts the de# tent or pawl out of its engagement with the pinion. As soon as the push-button is released, the spring F returns thepawl, and the top arm cl forces the pushebutton out to its normal position. IVhen it be desired to unlock and keep the sash unlocked for any appreciable length of time-as, for example, inworking about it and cleaning the glassthe pushbutton is turned axially, whereby the edge of its inclined inner end comes in contact with and raises the arm CZ upon it until, having -turned half-way around, it holds the arm in this position as long as may be required, thus keeping the detent from its engagement with IOO the pinion. The parts may be released again by turning'the push-button back. In order to freely etectthis turning action, I may slightly curve the edges of the inclined or 5 beveled end g2 of the push-button near its point, so that they will act Without undue friction on arm d.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a sash-lock, and in combination with a movable detent or paWl by which the locking is effected, the means for withdrawing said detent or pawl from its engagement, consisting of a single push-button adapted to have both a sliding and axial movement, and provided With an inclined or beveled inner end, whereby the detent 0r pawl is Withdrawn by either movement of the button, substantially as herein des zribed.

2. In a sash-lock, the vcombination of the plate E, attached to the sash, the sliding locking detent or pawl seated in said plate and having a horizontal arm d and a spring connecting said arm with the plate, whereby the deten't or pawl is held normally projected, and a push-button adapted to have both a sliding and axial movement, and provided With an inclined or beveled end operating against the horizontal arm of the detent or pawl, substantially as herein described.

In Witness whereof I have hereunto set my hand.

BENJAMIN MARSHALL.

VitnesseS':

AXEL JOHNSON, RALPH O. IvEs. 

